What is a Pie Chart

A pie graph is a circular statistical graph which is divided into slices to illustrate numerical proportions. Normally a pie chart represents a whole or a total of 100% if all sectors were added.

See below a sample of a pie chart:

Shown in the sample is a PIE CHART. The graph is divided into 4; each division is what we call as SECTORS.

Since a graph represents a 100%, which means each sector has been equally divided into 25% each

In our everyday living, we can actually use pie charts to determine how much we spent, how much time did we consume for a certain activity, and how can we budget things up.

To give you an example, shown is a graph below together with its interpretation.

Shown in the left is the payday budget of a household. These consist of:

Food Allowance – 25%

Transportation – 15%

Medicine – 10%

Tuition Fee & School Allowance – 25%

Utility Bills – 15%

Savings – 10%

Using the illustration, if the household father has a salary of $400.00, let us compute for the allocation of each sector in the pie graph:

Food Allowance 25% x $ 400.00 = $ 100.00

Transportation 15% x $ 400.00 = $ 60.00

Medicine 10% x $ 400.00 = $ 40.00

Tuition Fee & School Allowance 25% x $ 400.00 = $ 100.00

Utility Bills 15% x $ 400.00 = $ 60.00

Savings 10% x $ 400.00 = $ 40.00

TOTAL $ 400.00

Shown in the illustration is the distribution of ages in a School. Ages are from 5 years old to 19 years old. As seen in the chart, there is an equal distribution of ages in the school. All 8 sectors has an equivalent of 12.50% age distribution.

If there are 2,000 students in the school. How many students are there in each age sector?

To compute, that is 2,000.00 x 12.50% is equivalent to 250 students each.

Test your knowledge on Pie Charts

1. Using the below pie chart which is the most popular competition?

Swimming

Basketball

Tennis

Badminton

2. If there are a total of 800 participants in all the games, how many contestants participated in the Swimming Competition?

220

250

240

260

3. If 100 people joined the Chess Competition, by referring to the chart how many participants join the Tennis Competition?

400

300

200

100

4. By just referring to the chart, what is the most favorite pizza topping?

Cheese

Sausage

Mushroom

Pepperoni

5. If Cheese has 50 votes as the favorite topping, how many total votes were collected for all the four topping